Casio’s $80,000 Sapphire G-Shock Marks a Decade-Long Engineering Milestone

Key points

• The MRG-D5000 costs $80,000, making it roughly eight times the price of a standard Rolex Submariner and comparable to a Porsche Macan or Patek Philippe.
• Only 20 units will be produced worldwide, with just six reserved for the US market, according to Gear Patrol.
• The watch features a 'Multi-Guard Structure' that assembles the sapphire case without screws, using interlocking components to distribute shock, a technique inspired by Japanese timber-frame houses.
• The collection, named the 'Blue Rose Project,' includes two additional models: the MRG-B5000SA-2 at $9,500 (limited to 500 pieces) and the GMW-B5000SB-1A at $850.
• All three watches are water-resistant to 200 meters, solar-powered, and feature radio-controlled timekeeping, maintaining G-Shock’s core functional identity despite the luxury materials.

Background

This release follows a decade of development that began with concept sapphire prototypes shown by G-Shock creator Kikuo Ibe in 2017. Earlier attempts, including a 2018 'Dream Project' gold watch, failed to meet shock-resistance standards due to the brittleness of sapphire. The current MRG-D5000 is the first retail G-Shock to successfully integrate sapphire into a shock-resistant design, building on the titanium Multi-Guard structure introduced in 2022. Our archive notes that Casio previously launched this specific model on October 1, 2026, confirming the timeline of this high-profile reveal.

How outlets are covering it

Gear Patrol emphasizes the sheer price disparity, noting the watch costs eight times more than a Rolex Submariner and outpaces many luxury cars, framing it as a 'power move' for the brand. WIRED highlights the technical challenge, describing the project as an eight-year effort to make a 'near-unbreakable' watch from an inherently brittle material, and notes that only one technician at Casio’s Yamagata factory can currently assemble the complex case. Hodinkee provides a hands-on perspective, acknowledging the watch’s novelty but criticizing its thickness (16.45mm compared to 12.9mm for titanium models) and the 'clunky' feel of the pushers, while praising the historical significance of fulfilling Ibe’s dream. Fratello Watches focuses on the engineering solution, detailing how the screwless, interlocking design prevents cracking, and notes the inclusion of a unique numbered caseback and 'Dream Project' inscription.

Why it matters

The MRG-D5000 redefines the boundaries of the G-Shock brand, moving from a niche of affordable, rugged digital watches into the ultra-luxury segment. By successfully engineering a shock-resistant sapphire case, Casio demonstrates that its core value proposition—durability—can coexist with high-end materials, potentially attracting collectors who previously viewed G-Shock as purely utilitarian. The limited release of 20 pieces also positions the watch as a high-value collectible, comparable to top-tier Swiss luxury brands, while the accompanying lower-priced models allow the brand to test the market for sapphire-accented designs without the extreme price barrier.

What to watch

The MRG-D5000 is available now, while the MRG-B5000SA-2 and GMW-B5000SB-1A are scheduled to go on sale in November 2026. Collectors should monitor the availability of the 20 limited units, as the US market is reserved only six pieces. Future releases may see further experimentation with exotic materials in the MR-G line, given the success of the Blue Rose Project in bridging the gap between G-Shock’s heritage and luxury watchmaking.